Rag-beater for paper manufacture.



No. 648,899. Patented May I, I900. l. P. DILLON.

RAG BEATER FOR PAPER MANUFACTURE.

(Application filed Dec. 22, 1899.)

(N0 Modei.)

IN I. DILLON, OF LAIVRENOE, MASSACHUSETTS.

RAG-BEATER FoR PAPER MANUFACTURE.

SPECIFICATION forming part of Letter s Patent No. 648,899, dated May 1,1900.

Application filed December 22, 1899. Serial No. 741,239. (No model") To(all whom it nmy concern:

Be it known that I, IRWIN I. DILLON, a citizen of the United States,residing at Lawrence, county of Essex, State of Massachusetts, haveinvented an Improvement in Rag-Beaters for Paper lllanufactu re, ofwhich the following desc iption, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

My invention is an improved beating-engine for beating paper-waste,rags, 850., into a pulp or nacerated mass, and relates more particularlyto the form of the tank at the end containing the beater, being animprovement on theform of device shown inmy United States Patent No.524,497, granted August 14, 1.894. In my said patent I provided meansfor causing the stuff to turn over, consisting of a special formation ofthe back fall and adjacent trough, the back-fall being out under at theend thereof adjacent the mid-board and the trough shaped to direct thestuff with a twistjecting edge ing movement, so that the inner portionthereof would pass over the outer portion thereof, the latter beingdeflected by the rear wall of the trough, so as to be directed into theundercut part of the back-fall, the undercut of the back-fall resultingin an overhanging part or apron which would serve to shoot out he innerpart of the flowing stuff over the outer part thereof, as explained.

In practice I have found that the broad idea covered by my aforesaidpatent is correct and the machine works in a very superior manner, andthe present invention aims at producing the results above alluded tomore aoeurately and perfectly than before; andto this end I haveextended the inper top edge of the back-fall so that it projectsconsiderablyover the stuiI and have deflected its prodownwardly, so asto dip toward the bottom sufiiciently to act as a deflecting plate forthe flowing stuif; and a further feae ture of my invention resides ingiving the rear wall at its end adjacent the outer side of the beaterside of tr.) tank a rearward curvature extending rearwardly toward thecentral line of the tank. I also make the higher end of the trough quiteshallow and narrow, while the trough from its highest point onward isbroadened out rapidly. In short, I have improved the shape of the troughand adjacent parts in a large number of details, includin those abovepointed out, as well as those hereinafter referred to, or as will bemore particularly explained in connection with the followingdescription, taken in connection with the accompanying drawings, inwhich I have tion, and the latter will be more particularly defined inthe'appended claims.

In the drawings, Figure 1 is a top plan View of a sufiicient portion ofthe tank and beater to make inyinvention clear, the'bonnet shown inFigs. 2 and 3 being removed. Fig. 2 is a central longitudinal verticalsection thereof, taken on the line 2 2, Fig. 1. Fig. 3 is a transversevertical section taken on the line 3 3, Fig. 1.

The tank proper, a, adjusting mechanism a therefor, and details of thebeating-engine may be of any usual or preferred kind and arrangement,iny invention relating to the back-fall and trough end of the tank, asexhibited at the right end of Figs.'l and 2. The back wall a instead ofsimply being rounded with a more or less square corner is given a moreor less convolute shape, being joined at a to the outer side mid-boarda, heater a straight line to a point a about opposite the ried in a widesweep approximately on a circular curve to the side wall-a.

For convenience of description I have termed theinclosed space a trough,(desig nated as a The bottom ofsaid trough at its narrow 'end is quiteshallow,as indicated at a,

curvature at the narrowest part or extreme upper end of said trough, andthence sloping with a mately on a straight line to adjacent the cen terline of the side of the engine opposite the beater, as indicated at a,Fig. 3. At' its rear side the trough has preferably a gradual as far asor slightly alinernent thereof with the mid-board, and from said pointonward the tronghhas a vertical wall at, increasing in extent "or depththence to the lowermost end a.

The bottom and main portion of the trough just described are hereinshown as consisting shown a preferred embodiment of my inven-- a in acurve more or less approaching a Fig. 3, having a slight downwardslanting very slight curvature or approxicontinuous slanting curve, asindicated at a, beyond the point of general middle of the back-fall awhence it is c'artooof a casting whose upper edge a is substantiallyflush with the frameworli: or tank end proper at the upper right-handportion of Fig.

1, and in the lower right-hand part of said Fig. 1 descends obliquelyalong the tank end until it approximately coincides with the bottom ofthetrough at a. v

lVhile I have in the above explanation de scribed all the details ofshape minutely, I wish it understood that I do not limit my invention inall the particulars set forth inasmuch as the general ideas of curvatureare new and produce greatly-improved results even though all thefeatures explained are not used together or are not employed in theirmost finished form. I have endeavored above to explain the curves andshape precisely and definitely in order that those skilled in the artmight fully and completely understand the same; but by so doing I do notlimit myself to such an extent as to prevent wide Variations therefromin details of curvature and form.

The undercut portion of the baclnfall (t is indicated by dotted line ain Fig. 1 and is indicated by shading in Fig. 2, from which it will beseen that at its lower part .it is more undercut than at its upper part,which slopes downwardly toward the beater, whereas the surface ot' theback-fall at the end thereof slopes downwardly away f romthe beater, thetwo opposite curvatures merging into each other, the object beingto givethe stuff as much. of a tendency to twist or form a vortex as possibleas it is deflected by the rear wall a and plunges forward with anundcrc'urve against or toward the undercut part ot'- the back-fall.Above this undercut part of the back-fall I provide an overhanging orrootlike projecting plate (1", extending along the top of the back-fallapproximately half the length thereof at the end toward the mid board,this plate ,overhanging the undercut part slightly andthence being bentdiagonally forward, as shown more clearly in Fig.

2, so as to provide on its depending forward i edge a at/the partthereof in line with the mid-board and at the side thereof away from asthcs'tutl at the inside is (ls-la the beater,a retainer or guidefiangeor rib,th is depending part of said plate being brought around theend of the mid-board in a curvagun; a ,'as indicated in Fig. 1, so thatthe ower edge of said plate acts as a guide or re, :talner to catch anddeflect or retain the surface part of the stutf as it flows toward andalong the undercut part of tho back-fall." At itsnpper end/theguide-plate or retainer a has preferably a post-like round projection orturning-center a preferably bearing against the end of the mid-board andserving to give an easy slipping flow to the stuff whenever the -stuffgets as'high as that point in the tHLkRiadalso: fix-events the tcndcncof the to clog at this point. As the stud. at the outside, pours overthe back-fall, it is directed back lreiieath the retainer where iii."the upper surface of the plate or retainer a, so

away from the mid-board on the side of the,

latter opposite the beater, whereby some of the stuff may fiow under thesaid overhanging post or turning-center and its flaring base, and someof the stuff may flow from the inner end of the backfall onto said baseand be carried thereby and directed toward the outside of the tankopposite the beater. The guide-plate a merges into the back-fall at theouter end of said plate and grows gradually broadcr throughout itslength as far as the mid-board, the free edge of said plate extendingobliquely outward and downward away from said backfall toward thebroader end of the plate, so as to provide a substantially-arched cavityadjacent the undercut portion of the back-fall for the stuff whichpasses over the outer end of the back-fall. Preferably extending fromadjacent the rounded end or turning-post a is a bonnet a, spanning orarching over the trough to the opposite wall a of the tank,.so as toprevent all slopping and spattering of the flow of the stuff owing tothe extreme agitation of the stuff produced by the special formation ofthe trough, as above explained.

It will be understood that the shapeof tank end which I-have devisedgives an extremelythorough and complete turning over to the stuflf; butall this is accomplished by the force of gravity rather than bymechanical power, being produced simply by providing the properdetlocting and opposing planes of impact for the stuff to strike againstand for directingand turning and diverting the heavy How of stud as itis poured over the back-fall by the beater a In order to prevent anyseeping through of the liquid at the joints of the beater-shaft a, Imount on said shaft thin radial disks 0. which run in grooves cuttherefor in housings a so that as the shaft rotates the joints arepractically sealed against the escapeof the liquid, and because of theradial extent of these disks (1 the vertical adjustment of the shaft ispossible, as indicated in dotted lines the liquid.

In operation the stu ll? which has been flow ing at the outside portionof the tank adjacent the wall (1, upon being driven by the beater-overthe back-fall strikes against the shallow and peculiarlycurved part ofthe trough and is at once deflected not only to ward the left, Fig. 3,but also slightly toward the left, Fig. l, and downwardly as well, dueto the curve, Fig. 2. At the same time the stuff which has been Ilowingat the inner portion of the tank adjacent the mid-board a is driven overthe back-fall and directed partly by the plate m and mainly by the walln/of the ees eee trough to the left, Figs. 3 and 1,the shape of thetrough causing said portion of the stuff to flow ,mately-straightpart aof the end wall irpoir being deflected toward the undercut part of theback-fall rushes beneath thehigherarchcd part of the overhanging plate aand beneath the stream of stuff which is fiowin g over-sa d plate and isthen caught 01- guided between the depending outer and lower end a 'ofsaid guide-plate or retainer a and the forwardly and downwardly slopingundercut part of the back-fall, as indicated at a, and is therebycompelled to retain its position ad jaeent the mid-board,so that iteventually comes around to the beater again in reversed position'fromthat occupied by it previously. This result has been the object soughtin-\-ariousbeatingengines previously-devised, but by entirely.

diflereut mechanism and with more or less inferior results.

One of the main dilliculties in this class of machines is that thestuff, especially at the beginning of the heating process, is veryliable to settle, so that at timesthe entire mass of stuif in the tankwill been me stationary. This cannot talge place in. my machine for thereason that the-turning over ofthe stuff afteu it leaves the beater a?is not due to the movement given thereto by the beater, but is due tothe force of gravity acting upmr the stuff as i t falls and flows alongthe variousl curved and shaped surfaces and cobperatiilg parts, asalready fully explained.

I have already stated that I did not limit myself in all the respectsshown and explained,

I and I therefore repeat that it ism y intention to cover my inventionbroadly, as more particularly set forth in the following claims.

Having fully described my invention, what I claim is- 1.Inabcating-engiue,ainid-board,abeater and aback-fall over which'thestull' is driven by said heater, said back-fall at its inner endadjacent said mid-board having an overhanging plate, the free projectingedge of said plate extending downwardly at the end thereof adjaccntsaidmid-board, to constitute a retaining orguidingdevicc for the flowingstull,

substantially as described.

2. In abc ating-engineni mit'l-board,abeater, and a back-fall'over whichthe stullf is driven by said bmter,sai l back-fall at its innerendadjacent said mid-board'having an overhanging plate, the free projectingedge of said plate extending downwardly at the end thereof adjacentsaidmid-board and extending partially around the end of said mid-board in acurve approximately concentric thereto, substantially as described.

3. In abeati'ng-engine, a mid-board,a heater and a back-fall over whichthe stuff is driven by said beater, said bark-fall at its inner endtial1y as described;

desccnt toward and adjacent to the beater edge of the tank thronghoutthcmore shaladjacent said mid-board having an overhanga mid-board,a'beater, and a back-fall over which the stu'ffis driven by said beater,means 7 5 for'turning the stud over and causing the peripheral flowthereof to-reverse places in the tanlrnwitle'the mid-board flow thereofafter passing said heater, and an overhanging de; pending deviceextending downwardlytinto the path of the dew of the stufl. at the endof said mid-board on the side thereof away from said heater,substantially as described.

5. In a beating-engine, atank, containing a mid-board, a heater, andaback-fall, said back-fall being undercut at the end thereof adjacentsaid mid-board and having a plate extending forward from the top efthebackfall, said plate extending along said back-fall ap iroximately halfthe length thereof, and on growing uniformly broader. throughout its.length approximately as ar as said midboard, the free edge of said plateextending obliquely downward and away from said back fall from thenarrow end of the plate to the 'broad end. thereof, whereby asubstantiallyarched cavity is provided adjacent said undercut portion of-the.bac k-fall for the passage'of the stuff driven ever the outer endof the back-fall opposite thc mid-board,substanloo 6. In abeatingengine,a tank, containing\ a mid-boarch'a beater, and a baclcfall, saidback-fall at the end thereof adjacent said midboard being undercut, thesurface of said io5= back-fall opposite said beater and at the outer endof the back-fall sloping downwardly array from 'thebeateryand thencecurving toward said undercut portion and sloping downwardly toward saidbeater at the end of said no undercut next to said inid-board,'substantially. as described.

7. In a beating-engine, a tank, a heater, a. back-fall and a trough attheend'of the tank adjacent said beater to receive the stuff driven bysaid beater over the back-fall, said trough being (narrow at its upperend and continually broader toward it-slower or discharge end, thebottom of said-trough being shallow with only a slight curvature at. itsupper end and extending thence downwardly in approxiulately'a straightline to about the median line of the division of the tank opposite saidheater, the rear wall curving gradually at allpoints throughout itslength with a gradual side of thetrough, the beginning of said ourvaturebeingapproximately flush withtho'top low part .of the trough and thencedescending graduallyapproximately to the bottom of the trough at thedischarge end thereof, substantially as described;

l S. In a beating-engine, atank tnid-bonrd,.

a beatenya back-fall, said back-fell being in line withthe end of themid-board, and a rounded vertical turning-center adjacent-the junctionof the back-fall'a-nd mid-board for the stuff to turnQ'ai'oundatflthefend of the tank, substantially as described. 1 v 9.Inabeating-englne, :1 tanlg'amid-board; a heater, 3. back-fall, saidback-fall being-in line with the end of the. mid-board, and a roundedvertical turningeenter adjacent the junction of the back-full andmid-board fOl the stuff to turn around at the end of the tank, saidrounded turning-center buying a flaring, sloping base air-a level tocome beneath the normal surface ofthe stuff, substantially as described.v

.10. In a beating-engine,a tanliga mid-board, a heater, :1 back-fall,szihllmek-lall being in line with the end the inid-board," stnd trounded turning-center adjacent thejune- 20 tion of the back-fall andnid-board for'tihe stuff to turn around at the end .ofthetan'k, saidrounded turning-center having a. flaring,

sloping base adjacent; .bnt belowthe. top level of the tank said baseand turning-een'tefprm 2 5 jeetinglaterally beyond and away-fromisaicl.mid-board on the side thereof oppositethe beater, substantiallyasdeseribed;

In testimony whereof I have signed my name tothis specification. intheprese-nee of 30

